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Teaching suggested applications*

• Simulation of 18 conventional refrigeration failures
• Study of the basic concept of a refrigeration installation with R134A, with double evaporator.
• Study of the thermodynamic cycle of enthalpy diagram and display in real time on PC.
• Calculation of cooling capacity to the condenser and evaporators.
• Overall efficiency of the unit.

Description

The CRC112 bench allows the study of a low-pressure refrigeration cycle with double evaporator.

The system allows you to view the two refrigerated chambers and validate the performance difference between a positive and a negative system. Students will start up the system and do temperature readings with different operating modes.

They will analyze the data and understand what is the influence of the various components on the system.

They can view the refrigeration cycle in real time on the touch screen integrated on the machine.

They can also make troubleshooting thanks to the system that simulates 18 failures.

The robust design of this device makes it suitable for use in schools.
The equipment is set up on an Anodized aluminum frame on casters wheels. This gives it great strength and a flexibility of integration into your premises. The manufacture of this equipment complies with the European standard for machinery manufacturing.

1. Semi hermetic reciprocating compressor :

- Fluid : R134a

- Power: 1800W (0°C / 32°C)

- Maximum operating pressure: 28bars

- Start-up pressure regulating valve (KVL) at suction

- Load regulation valve (KVC) between the discharge and suction compressor.

- Safety pressure switch HLP and LP control pressure switch

-  Suction line accumulator at the suction and bottle of oil recovery at discharge

2. Condenser with forced ventilation

- Air flow rate 1700m3 /h

- Pressostatic inverter for fan speed

3. Steel liquid tank

-Volume : 2.4L

4. Dehydrator filter anti acid (X2)

- With upstream liquid sight glass

- A filter for normal operation

- A clogged filter for failure simulation

5. Liquid vapor exchanger (X1)

- An exchanger for the positive chamber placed upstream of the pressure reducer and on the return of the evaporator

- Bypass valve

6. Control solenoid valve (x2)

- For pump down control

- set up  upstream of expansion  valve of each chamber

7. Internal equalization thermostatic expansion valve (x2)

- One for each room

-+1 failure simulation pressure reducing valve for the positive chamber

8. Positive cold chamber with evaporator

- Exchange surface: 1.3m²

- Evaporator with forced ventilation

- Condensate collection bin on the bottom part

- Evaporation pressure control valve of KVP type

- Electronic temperature controller controlling the solenoid valve, the evaporator fan and the defrost

9. Negative cold chamber with evaporator

- Exchange surface: 1.65m²

- Evaporator with forced ventilation

- Condensate collection bin on the bottom part

- Electric defrost heater

- Defrosting system by hot gas (injection of outlet gas of the compressor in counter-current in the evaporator and return into the liquid tank with check valve )

- Electronic temperature controller controlling the solenoid valve, the evaporator fan and the defrost

• Electrical supply : 400 Vac – 50 Hz – 10 A
• Electrical network : 3 phase(s) + Neutral + Earth.